Flexible magnification, multiple adaptability: The equipment is vertically divided into preheating zone, multi-stage stretching zone, shaping zone, and cooling zone; The stretching area adopts independent guide rails and servo zone control. Each section of the chain clamp guide rail expands with preset accuracy, achieving segmented progressive multi magnification stretching and adapting to the stretching process requirements of different materials. The stretching ratio can reach 3.9-6 times. The special design of the circulating air duct adopts a constant low speed circulating air duct and a static pressure uniform distribution structure. By optimizing the pipe diameter, opening distribution, and resistance balance, the air velocity in the oven area is uniform and the temperature field is stable; Cooperate with closed-loop temperature control and hot air circulation to ensure consistent heating of materials and avoid local temperature differences affecting stretching quality.